EP0877705B1 - Moyeu pour unite de propulsion par jet d'eau - Google Patents

Moyeu pour unite de propulsion par jet d'eau Download PDF

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Publication number
EP0877705B1
EP0877705B1 EP97900847A EP97900847A EP0877705B1 EP 0877705 B1 EP0877705 B1 EP 0877705B1 EP 97900847 A EP97900847 A EP 97900847A EP 97900847 A EP97900847 A EP 97900847A EP 0877705 B1 EP0877705 B1 EP 0877705B1
Authority
EP
European Patent Office
Prior art keywords
hub assembly
sleeve
shaft end
water jet
bearing housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97900847A
Other languages
German (de)
English (en)
Other versions
EP0877705A1 (fr
Inventor
Tommy Brunn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MJP Marine Jet Power AB
Original Assignee
MJP Marine Jet Power AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MJP Marine Jet Power AB filed Critical MJP Marine Jet Power AB
Publication of EP0877705A1 publication Critical patent/EP0877705A1/fr
Application granted granted Critical
Publication of EP0877705B1 publication Critical patent/EP0877705B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H11/00—Marine propulsion by water jets
    • B63H11/02—Marine propulsion by water jets the propulsive medium being ambient water
    • B63H11/04—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps
    • B63H11/08—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps of rotary type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H23/00—Transmitting power from propulsion power plant to propulsive elements
    • B63H23/32—Other parts
    • B63H23/321—Bearings or seals specially adapted for propeller shafts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H23/00—Transmitting power from propulsion power plant to propulsive elements
    • B63H23/32—Other parts
    • B63H23/321—Bearings or seals specially adapted for propeller shafts
    • B63H2023/327—Sealings specially adapted for propeller shafts or stern tubes

Definitions

  • the present invention relates to a hub assembly for journalling of the impeller in a pump housing of a water jet propulsion unit adapted for the propulsion of vessels, and is more specifically aimed at providing a hub assembly designed to allow for simplified assembly and dismounting upon replacement or maintenance work.
  • a water jet propulsion unit of the type herein referred to comprises a pump wheel or impeller, mounted on a drive shaft which is inserted through the inlet port.
  • the drive shaft end or the impeller is journalled in the pump housing by means of plain bearings or roller bearings and preferably, as in the disclosed embodiment, by an assembly of roller bearings in cooperation.
  • the hub assembly of the invention is not limited to the use in water jet propulsion units of a specific kind, but may as well be utilized with units that include a flexible, though torsionally stiff connection between drive shaft and impeller as in units with splined couplings or fixed connections between drive shaft and impeller.
  • the hub assembly of the invention also permits maintenance of bearings and sealings without the need for lifting or docking the vessel, provided that the vessel can be trimmed at the stem to raise the assembly above the water surface. If water-lubricated plain bearings are utilized in the hub assembly, the replacement could also be made by divers below water surface.
  • the purpose of the invention is to provide a hub assembly designed to journal an impeller or a drive shaft end in a water jet propulsion unit that permits simplified assembly and dismounting during maintenance, thereby avoiding the previously described problems.
  • the reference numeral 1 indicates a drive shaft journalled for rotation in a pump housing 2.
  • the drive shaft end comprises a shaft spindle 3 having a flange, an impeller 4 being bolted to the flange of the shaft spindle.
  • the shaft spindle is rotationally fixed to the extended end of the drive shaft by means of a coupling 5.
  • the drive shaft end or the shaft spindle 3 is journalled in a hub assembly according to the invention generally indicated with reference numeral 6, the hub assembly 6 being non-rotationally mounted in the pump housing stator 7.
  • shaft spindle in the present disclosure also shall be understood to be equivalent with the drive shaft end, as the invention is not restricted to the illustrated embodiment but is also applicable in such water jet propulsion units that lack the shown connection between the drive shaft and a shaft spindle, non-rotationally attached to the drive shaft end.
  • shaft spindle 3 may be integrated in the impeller, whereas the expression “shaft spindle” also should be understood to include a correspondingly designed and journalled part of an impeller.
  • the hub assembly 6 comprises a bearing housing 8, an inner sleeve 9 and intermediately disposed roller bearings 10 and 11.
  • the hub assembly 6 is sealed against penetrating water, at the shaft spindle 3 by means of a tightening lid 12 and a seal 13 disposed under the lid, and at the stern end by means of a cap 14.
  • the hub assembly is joined together by means of a tightening nut 15 in threaded engagement with the sleeve 9, outwardly of a bearing plate 16, whereby the sleeve 9 is axially fixed in the bearing housing 8 and concurrently clamping the bearings 10 and 11 between said bearing plate and a radially extended flange 17 disposed on the forward end of the sleeve.
  • the bearing housing, the bearings and the sleeve form a separate, integrated unit.
  • the hub assembly is clamped on the shaft spindle 3 by means of a locking nut 18 screwed thereon.
  • the bearing housing 8 has a substantially straight or towards the stem tapered, preferably cylindrical outer shape, and radially extended fastening means such as a number of attachment brackets or a flange 19 with through holes for bolting the hub assembly 6 to the stern end of stator 7 .
  • the tightening lid 12 has a radial width that corresponds to, or preferably extends inwardly of the periphery of the bearing housing 8, to allow for the free insertion of the bearing housing into the stator 7 from the stern end upon assembling, and upon dismounting to permit a free removal, respectively.
  • a shaft spindle 3 having a tapered section 3' could be journalled in the hub assembly 6, the tapered section having a taper corresponding to the taper of a tapered inner section 9' of the continous cavity through the inner sleeve 9.
  • the sleeve could thereby easily be slided onto the shaft spindle from the stem end, and slided off respectively, enabling the complete hub assembly to be dismounted and reassembled with pump, pump housing, impeller and shaft/shaft coupling still remaining in the propulsion unit.
  • the desired frictional engagement between the tapered contacting surfaces of shaft spindle and sleeve, respectively, is achieved so that the sleeve rotates with the drive shaft/shaft spindle rotation.
  • said frictional engagement is released either mechanically by the use of a puller tool or by an oil injection procedure, wherein pressurized oil is supplied for distribution between the tapered contacting surfaces, e.g. through a channel (not shown) opening at the outer end of the shaft spindle.
  • the locking nut 18 also prevents possible separation of the contacting surfaces caused by the axial thrust which is applied to the shaft spindle by the impeller.
  • a roller bearing assembly having a spherical axial/radial bearing for carrying axial loads is shown. It is however obvious for anyone skilled in the art that the advantages of the invention are not dependent on the bearing assembly shown, but may as well be achieved with the use of other combinations of roller bearings or plain bearings, oil or water lubricated, even if not explicitly shown herein. Furthermore, attachments different from the shown tapered coupling may be utililized to obtain a torsionally stiff connection between sleeve and shaft end/shaft spindle.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Massaging Devices (AREA)
  • Nozzles (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Mounting Of Bearings Or Others (AREA)

Claims (4)

  1. Dispositif démontable du type moyeu (« hub assembly ») pour la mise en rotation (« joumalling ») d'un rotor ou d'une turbine(4) (« impeller ») ou d'une extrémité d'un arbre de commande (3) dans un bâtiment de pompes (2) d'une unité de propulsion à jet d'eau pour la propulsion de navires, comprenant un logement du palier (8) dans lequel un manchon (9) est monté coaxialement (« joumalled ») pour la rotation, caractérisé en ce que le logement du palier (8), les paliers (10,11) et le manchon (9) forment ensemble un dispositif (6) intégré, séparé, qui, comme une seule unité est démontable à l'arrière à partir du bâtiment des pompes, sans avoir besoin de démonter le bâtiment des pompes, le rotor ou la turbine ou l'arbre de commande à partir du navire.
  2. Dispositif du type moyeu selon la revendication 1 caractérisé en ce qu'une cavité continue à travers le manchon (9) est adaptée à la forme de l'extrémité de l'arbre (3) et y est fixée de manière axiale et non-rotative.
  3. Dispositif du type moyeu selon l'une quelconque des revendications 1 et 2 caractérisé en ce que la cavité du manchon présente une section conique (9') avec un ajustage conique (« taper ») correspondant à celui de l'extrémité de l'arbre (3'), de telle manière que, lors du serrage d'un écrou de blocage (18) (« locking nut») sur l'extrémité de l'arbre, le manchon est fixé à l'extrémité de l'arbre par frottement («frictional engagement ») entre les surfaces coniques.
  4. Dispositif du type moyeu selon la revendication 1 caractérisé en ce que le logement du palier (8) présente une forme externe sensiblement droite ou effilée vers l'arrière (« stem »), de préférence cylindrique avec des moyens de fixation (19) s'étendant radialement pour fixer au moyen de boulons le logement du palier au côté arrière du stator de la pompe à jet d'eau (7).
EP97900847A 1996-01-16 1997-01-15 Moyeu pour unite de propulsion par jet d'eau Expired - Lifetime EP0877705B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9600157 1996-01-16
SE9600157A SE9600157L (sv) 1996-01-16 1996-01-16 Navpaket för stråldriftsaggregat
PCT/SE1997/000048 WO1997026183A1 (fr) 1996-01-16 1997-01-15 Moyeu pour unite de propulsion par jet d'eau

Publications (2)

Publication Number Publication Date
EP0877705A1 EP0877705A1 (fr) 1998-11-18
EP0877705B1 true EP0877705B1 (fr) 2001-05-16

Family

ID=20401045

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97900847A Expired - Lifetime EP0877705B1 (fr) 1996-01-16 1997-01-15 Moyeu pour unite de propulsion par jet d'eau

Country Status (7)

Country Link
US (1) US6053783A (fr)
EP (1) EP0877705B1 (fr)
JP (1) JP3950172B2 (fr)
AU (1) AU711003B2 (fr)
NO (1) NO312090B1 (fr)
SE (1) SE9600157L (fr)
WO (1) WO1997026183A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6361388B2 (en) 1999-10-12 2002-03-26 Glenn D. Foreman Marine motor drive assembly
SE519109C2 (sv) * 2000-06-07 2003-01-14 Rolls Royce Ab Drivsystem för drivning av fartyg
SE518942C2 (sv) * 2000-10-02 2002-12-10 Rolls Royce Ab Axiellt justerbar trycklagring för stråldriftsaggregat
CN108082429A (zh) * 2017-11-30 2018-05-29 中国船舶工业集团公司第七0八研究所 一种大功率喷水推进泵导叶体组合结构
CN108327883A (zh) * 2017-12-29 2018-07-27 中国船舶工业集团公司第七0八研究所 一种喷水推进装置轴系结构

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5018999A (en) * 1987-01-23 1991-05-28 Sanshin Kogyo Kabushiki Kaisha Propeller driving device of marine propulsion unit
SE457165C (sv) * 1987-05-21 1990-04-17 Mjp Marine Jet Power Ab C O Oe Straaldriftsaggregat
US4948384A (en) * 1989-05-12 1990-08-14 Outboard Marine Corporation Marine propulsion device anode arrangement
US4986775A (en) * 1989-07-06 1991-01-22 Brunswick Corporation Propeller shaft bidirectional thrust bearing system
WO1995035457A1 (fr) * 1994-06-20 1995-12-28 Ramsay Thomas W Ensemble joint d'etancheite/surface de roulement
US5554003A (en) * 1995-05-31 1996-09-10 Hall; Arnold M. Controllable pitch propeller for propulsor and hydroturbine

Also Published As

Publication number Publication date
SE504604C2 (sv) 1997-03-17
JP3950172B2 (ja) 2007-07-25
US6053783A (en) 2000-04-25
SE9600157D0 (sv) 1996-01-16
NO983198L (no) 1998-09-15
NO312090B1 (no) 2002-03-18
EP0877705A1 (fr) 1998-11-18
AU711003B2 (en) 1999-10-07
SE9600157L (sv) 1997-03-17
WO1997026183A1 (fr) 1997-07-24
JP2000503274A (ja) 2000-03-21
AU1326697A (en) 1997-08-11

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